Dirk-Jan Walstra, C. W. Hoyng, P. K. Tonnon, Leo C. Van Rijn


This experimental study focuses on the morphological development of a near-equilibrium profile on which to types of shoreface nourishments are placed. As previous studies have indicated that the efficiency of nourishments is mainly influenced by water depth in which they are constructed, two cross-shore locations are considered for an accretive and an erosive wave condition. A nourishment relatively high in the profile covering the trough and a nourishment relatively low in the profile just seawards of the breaker bar were investigated. Detailed measurements of wave height, velocities and sediment transport are combined with the observed morphological development to identify the processes that dominate the morphological development. The results confirm that the cross-shore location of nourishment has a major influence. The nourishment in relative deep water reduces the erosion of the upper part of the profile by about 20% for the accretive condition and 40% for the erosive condition. The nourishment higher in the profile results in a reduction of the erosion volume of 60% for both wave conditions.


shoreface nourishment; physical experiment; process measurements

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Bosman, J.J, E.T.J.M. van der Velden, C.H. Hulsbergen, 1987, Sediment concentration measurement by transverse suction. Coastal Engineering, 11: 353-370.http://dx.doi.org/10.1016/0378-3839(87)90033-0

Hamm, L., Capobianco, M., Dette, H. H., Lechuga, A., Spanhoff, R. & Stive, M. J. F., 2002. A summary of European experience with shore nourishment. Coastal Engineering, 47 (2), 237-264.http://dx.doi.org/10.1016/S0378-3839(02)00127-8

Koomans, R.L. and J. Bosboom (2000). Laboratory experiments on sediment dynamics and density gradation: Part I, time-averaged measurements. Delft Hydraulics report H2305.73.

Koningsveld, M. van, and J. Lescinski, 2006. Decadal scale performance of coastal maintenance in the Netherlands. Shore and Beach, 75(1), 1-17.

Van Duin, M.J.P., N.R. Wiersma, D.J.R. Walstra, L.C. van Rijn and M.J.F. Stive, 2004. Nourishing the shoreface: observations and hindcasting of the Egmond case, The Netherlands. Coastal Engineering, 51 (8-9), 813-837.http://dx.doi.org/10.1016/j.coastaleng.2004.07.011

Walstra, D.J.R., van Ormondt, M. and Roelvink, J.A., 2004. Shoreface nourishment scenarios : detailed morphodynamic simulations with Delft3D for various shoreface nourishment designs. Delft

DOI: http://dx.doi.org/10.9753/icce.v32.management.30